[PATCH 10/13] clk: boston: Allow to get regmap from parent device

[Jiaxun Yang]

In upstream devicetree, clk_boston is a child of syscon node
and there is no "regmap" property for clk_boston node.

Try to check parent device first to look for syscon.

Signed-off-by: Jiaxun Yang <jiaxun.y...@flygoat.com>
---
 drivers/clk/clk_boston.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/clk/clk_boston.c b/drivers/clk/clk_boston.c
index 030ff7cc58ec..2e584ed867d5 100644
--- a/drivers/clk/clk_boston.c
+++ b/drivers/clk/clk_boston.c
@@ -64,11 +64,15 @@ static int clk_boston_of_to_plat(struct udevice *dev)
        struct udevice *syscon;
        int err;
 
-       err = uclass_get_device_by_phandle(UCLASS_SYSCON, dev,
-                                          "regmap", &syscon);
-       if (err) {
-               pr_err("unable to find syscon device\n");
-               return err;
+       if (device_get_uclass_id(dev->parent) == UCLASS_SYSCON) {
+               syscon = dev->parent;
+       } else {
+               err = uclass_get_device_by_phandle(UCLASS_SYSCON, dev,
+                                                  "regmap", &syscon);
+               if (err) {
+                       pr_err("unable to find syscon device\n");
+                       return err;
+               }
        }
 
        state->regmap = syscon_get_regmap(syscon);
@@ -94,4 +98,5 @@ U_BOOT_DRIVER(clk_boston) = {
        .of_to_plat = clk_boston_of_to_plat,
        .plat_auto      = sizeof(struct clk_boston),
        .ops = &clk_boston_ops,
+       .flags = DM_FLAG_PRE_RELOC,
 };

-- 
2.34.1